[TechAssist] Re: Philips F8 - Vert Problem
- From: mebonnell@xxxxxxxxx (Old TV Man)
- To: techassist@xxxxxxxxxxxxx
- Date: Mon, 11 Oct 2004 16:29:57 -0500
Dan I have the schematic if you want any of it scanned.
Max Bonnell
Bonnell TV
Robinson, IL
Sender: techassist-bounce@xxxxxxxxxxxxx From:
dgarris@xxxxxxxxxxx(Dan=A0Garris) Date: Mon, Oct 11, 2004, 5:03pm
(CDT+1) To: techassist@xxxxxxxxxxxxx Subject: [TechAssist] Re: Philips
F8 - Vert Problem? Reply=A0to: techassist@xxxxxxxxxxxxx
Thats what I thought as well. I have no Yoke buzzing and the picture has
no Convergence problems or keystoning - just the bottom half of the
picture has "lots of lines" in it. You can see thru the lines and make
out the bottom of the picture and when you change channels the On-screen
display (which shows at the top of the picture) can be seen retracing at
the bottom of the screen along with the lines in the bottom of the
screen. The top half is fine. I even replaced C2489 even though it
tested ok with the ESR meter. I still have the problem. I've not seen
this problem on the F8 before!
Dan Garris
Garris TV
New Bern, NC
dgarris@xxxxxxxxxxx
(252) 638-4477
From: "John at Main TV" <maintv2004@xxxxxxxxxxx>
Reply-To: techassist@xxxxxxxxxxxxx
To: <techassist@xxxxxxxxxxxxx>
Subject: [TechAssist] Re: Philips F8 - Vert Problem?
Date: Mon, 11 Oct 2004 14:47:15 -0600
The F8 is very common for yoke problems but your symptom does not sound
like
a yoke. It usually causes bad convergence or a buzz. The only way that I
know to check is by substitution from another 27 ". Or if you swap one
from a 25", it will work but the convergence will be way off. The cost
of the yoke is around $50. The common problem for foldover on the bottom
is C2489. John.
John Mielke
Main TV
636 main St.
Longmont, Co
phone 303 776 6955
fax 303 776 0792
maintv2004@xxxxxxxxxxx
----- Original Message -----
From: "Dan Garris" <dgarris@xxxxxxxxxxx>
To: <techassist@xxxxxxxxxxxxx>
Sent: Monday, October 11, 2004 2:19 PM
Subject: [TechAssist] Philips F8 - Vert Problem?
Make: =A0 Philips 27" TV
Model: =A0 TS2746 C101
Chassis: F8
Has vertical lines (bad vertical foldover) only on "bottom half" of
picture. Top half of picture looks fine. I replaced the STV9379FA
Vertical output
IC
(no change) and checked all vertical caps and C2489 (all ok) (no change)
also checked R3409 & R3488 out of circuit (they were ok). TV does not go
into shutdown nor does it have any keystone effect, just bad Vert
foldover on bottom half of picture. Tips say maybe bad Yoke?
BTW, This is "NOT" the common bright screen symptom caused by R3340 on
the CRT board. This set stays on and has a picture. Anyone seen this
problem?
Is
it the Yoke?
Dan Garris
Garris TV
New Bern, NC
dgarris@xxxxxxxxxxx
(252) 638-4477
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